How is 26 x 2 rms > than 4 x 100 rms (active setup)

Hey just got an alpine 9835 and decided to go active with my QSD 216's...and as it turns out my CDT's hooked to the deck (at 26 rms) are louder than my front QSD's?
Keep in mind that my gains are atleast at half...........any one have any suggestions?